
Ask the Expert: An Interview with Nate Lawson, DMD, MA, PhD
on Sectional Matrix Systems
Question
What is the advantage of using sectional matrices over circumferential matrices for composite restorations?
Answer
Question
How do the DualForceTM Ultra- Wrap™ Matrix Bands compare to other sectional matrix bands?
Answer
The DualForce Ultra-Wrap Matrix Band has an anatomical contour that differentiates it from earlier bean-shaped sectional matrices. The matrix has a lip on the occlusal edge of the band that helps to form the occlusal embrasure. Additionally, the matrix has a gingival apron (that can be trimmed) that extends gingival beyond the bottom of the box to help adapt the matrix to the tooth while still forming a cleansable emergence profile.
The matrix has a U-shaped contour in the buccal-lingual direction that helps to produce a wide buccal-lingual contact. The thickness of the matrix is about 35 microns, however, it is not dead soft. The firmness of the matrix helps to prevent crimping when inserting the matrix and deformation while adjusting the matrix.
Question
How do you pick the correct size of Matrix Band?
Answer
Question
What are some of the features of the DualForce Active-Wedge™ that differentiate this tool?
Answer
Question
From which direction should the wedge be placed?
Answer
Question
How does the DualForce Ring compare to other separating rings?
Answer
Question
How do you manage side-by-side Class II restorations?
Answer
ABOUT THE AUTHOR
Nate Lawson DMD, MA, PhD is the Director of the Division of Biomaterials at the University
of Alabama at Birmingham School of Dentistry and the program director of the Biomaterials residency program. He graduated from UAB School of Dentistry in 2011 and obtained his PhD in Biomedical Engineering in 2012. His research interests are the mechanical, optical, and biologic properties of dental materials and clinical evaluation of new dental materials. He was the 2016 recipient of the Stanford New Investigator Award and the 2017 3M Innovative Research Fellowship both from the American Dental Association. He served on the American Dental Association Council of Scientific Affairs and is on the editorial board of The Journal of Adhesive Dentistry and Compendium. He has lectured nationally and internationally on the subject of dental materials. He also works as a general dentist in the UAB Faculty Practice.
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